Multi-Deck Screening Machine With Return Conveyor Belts
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Solution Overview
Problem
Conventional multi-deck screening machines suffer from inefficient utilization of screen decks, where only about 50% of the screen surface is effectively used due to the natural inclination of the material flow, leading to suboptimal separation of grain sizes.
Innovation Solution
The implementation of a screening machine with multiple screen decks stacked vertically, where conveyor belts transport the screened material back to the start of the next deck below, ensuring 100% material usage and continuous screening across all decks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional multi-deck screening machines are used with inclined screen decks, then material flow follows gravity naturally, but only about 50% of the screen surface is effectively utilized
Solution Approach 1:
Instead of allowing material to flow down the inclined screen deck under gravity, the patent inverts the approach by using conveyor belts to transport material upward against gravity back to the start of each screen deck. This ensures 100% utilization of the screen surface area while maintaining natural gravity-driven separation.
Solution Approach 2:
The patent implements continuous material circulation through conveyor belts that constantly return screened material to the beginning of each screen deck. This continuous action ensures that the entire screen surface is continuously utilized, eliminating idle screen areas and maximizing productivity.
2Area of stationary object
If screen decks are arranged vertically with conventional conveyors, then equipment footprint is reduced, but material flow efficiency decreases
Solution Approach 1:
The patent transitions from horizontal material flow to vertical circulation by stacking screen decks vertically and using conveyor belts to move material upward in the vertical dimension. This maintains compact footprint while improving material flow efficiency through multiple complete passes over each screen surface.
Solution Approach 2:
The patent nests conveyor belts within the vertical structure of stacked screen decks, with each conveyor belt positioned to serve the screen deck above it. This nested arrangement maximizes space utilization and maintains compact equipment footprint while enabling efficient vertical material circulation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for 100% utilization of each screen deck, enhancing the separation efficiency of grain sizes by ensuring that all material passes through each deck, resulting in improved sorting and processing capacity.
Implementation Method 1
Conveyor belts are installed under these screen decks to transport the screened material back to the start of the next deck below
Implementation Method 2
screen decks arranged one above the other, which are movable in order to divide the material to be separated into fractions with different grain sizes
Implementation Method 3
The fractions with a larger grain size are disposed of at the end of the respective screen deck
Data Source
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AI summary
A screening machine with several screen decks (6) installed one below the other. Conveyor belts (7) are installed between these screen decks (6) for the return transport of the screened material to the beginning of the next screen surface below.